1. E. Z. Boltyanskii et al., Operational Reliability of Elevators [in Russian], Kolos, Moscow (1976).
2. F. A. Issers, E. S. Geiler, and V. I. Karev, “Asymmetry coefficients for stress cycles in the walls of reinforced-concrete silos during discharge of loose material,” Stroit. Mekh. Raschet Sooruzh., No. 1 (1979).
3. K. Takahashi and H. Gamahara, “Dynamic pressure of grain silo malls,” Industrial Report of the Research Lab. of the Shimizu Construction Co., Tokyo (1963).
4. S. B. Stazhevskii, “Deformation of loose materials in descending axisymmetric channels,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop, No. 3 (1981).
5. B. Yu. Mirzabekyan, “Analysis of pressure concentration for loose material in silos,” Stroit. Mekh. Raschet Sooruzh., No. 3 (1972).